21033132 has 24 divisors (see below), whose sum is σ = 51211776. Its totient is φ = 6706128.

The previous prime is 21033127. The next prime is 21033151. The reversal of 21033132 is 23133012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37828 + ... + 38379.

It is an arithmetic number, because the mean of its divisors is an integer number (2133824).

Almost surely, 2^21033132 is an apocalyptic number.

It is an amenable number.

21033132 is an abundant number, since it is smaller than the sum of its proper divisors (30178644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21033132 is a wasteful number, since it uses less digits than its factorization.

21033132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76237 (or 76235 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 21033132 is about 4586.1892677909. The cubic root of 21033132 is about 276.0374345360.

Adding to 21033132 its reverse (23133012), we get a palindrome (44166144).

The spelling of 21033132 in words is "twenty-one million, thirty-three thousand, one hundred thirty-two".